Water-heater.



E. TL CURRAN.

WATER HEATER.

APFLiCATION FILED JULY 7. 1917.

Patented Feb. 25, 1919.

AN, Rf 73 X E g/73755 7 345? EDWARD T. CURRAN, 011 DETROIT, MICHIGAN.

WATER-HEATER.

Specification of Letters Patent. Patented Feb. 25, 1919.

Application filed July 7, 1917. Serial No. 179,124.

To all whom it may concern:

Be it known that I, EDWARD T. CURRAN, a citizen of the United States, and a resident of the city of Detroit, in the county of Wayne. and" State of Michigan, have invented certain new and useful, Improvements in Water-Heaters, of which the following is a specification.

This invention relates to water heaters, and particularly to what aretermed gas heaters 'to supply a quick or instantaneous hot water supply or for a hot water heating system, and it is the object of the invention to provide a heater of this character which is simple, cheap and novel in construction and highly eflicient in operation.

In the present commercial heater of this character there is provided a tubular coil, usually a spiral coil of tubing, inclosed in a shell or cylinder to constitute a heat retaining chamber with a gas burner located in such shell below the coil. In thistype of heater there is considerable loss of heat due to heat radiation from the shell, and'it is the principal object of the invention to provide a structure in which the radiation of the heat from the combustion of the fuel or gas is reduced to a minimum,'and to provide a structure in which thewater to be heated constitutes a heat retaining jacket and also the chamber for the combustion of the fuel or gas, the jacket being constructed to comprise a circuitous passage from end to end of the jacket thereby retarding the rapid flow of the water therethrough' and assuring the water being heated to a high temperature.

In the drawing accompanying and forming a part of this specification Figure l'is a vertical sectional view of a heater illustrating an embodiment of my invention.

Fig. 2 is a sectional plan view.

Fig. 3 is a plan view of a partition to separate the water jacket into superposed communicating chambers.

Fig. 4 is a sectional side elevation of the partition shown in Fig. 3 taken on the line 44 of Fig. 3; and

Fig. 5 is a view of a portion of the lower part of the heater looking at the right of Fi 1 and showing means to control a secondary air supply to the burner in the combustion chamber.

Similar characters of reference designate like arts throughout the difl'erent views of the revving.

' hereinafter described.

In the embodiment of my invention shown a suitable gas'burner 9 to which is supplied the combustible mixture through-a pipe 10 extending through an opening" 11 in the shells and through which the burner may be placed into the combustion" chamber, said opening having a closure 14 which may be in the'nature' of doors for a purpose to; be

' The combustion chamber has an outlet for the products of combustion, such as a pipe 15 leading from'the topof the combustion chamber through the shells to be connected to a flue or'chimney, (not shown). I

' The space between the shells constitutes a jacket to contain thewater to be heated, said jackethaving an inlet 16 adjacent the' bottom, which comprises the return pipewhen the heater is utilized in connection with a heating system, and has a valved connection 17 with a water main or supply. The outlet -for the' jacket is at the top, asshown at 18.

The water jackethas annular partitions 19 comprising annular members split or severed transverselyto provide a space "or opening, as shown at 20 (Fig. 3), the annular members having lateral projecting portions 21 which are bent at right angles, as shown at 22 in dotted lines in Fig. 3 and in full lines in Fig. 4, to support and space the successive partitions from each other, as clearly shown in Fig. 1, thereby separating the jacket into superposed and communicating chambers. The partitions are so placed in the jacket that the openings 20 in successive partitions are staggered or at diametrically opposite points and remote from each other as shown in Fig. 2 thereby providing a circuitous passage for the water from end to end of the jacket.

Located in the combustion chamber 0 adjacent the upper end is a series of pipes or tubes 25' extending transversely of the Hit combustion chamber and connected at opposit'e ends to the Water jacket, these pipes being in parallel rows With adjacent rows extending at right angles to each other as clearly shown in Figs. 1 and 2. The pipes or tubes are preferably so located that one row of tubes will communicate With one "of the chanibersin the-jacket, and'the successive rows of tubes With adjacent chambers.

In the operation of the heater the gas or "fuel is 'ti'irned- 'onafid ignited at the burner throughthe opening =1=1- by moving the door or closure 14 to open-position after Which "the opening is *closed by the door or doors 14.1. Should- -'it"be-found that there is not a suflicie'nt' amoimt of air being supplied to the-burner through-the mi king-chamber (not -shovvn),xvvith which all such burners *are provided, a-"se'con'd'ary air supply may be supplied to 'the :bur-ner in the combustion chamber by moving 'the 'clbsure' I' l for the opening 11 'to open-position, or by opening the, 13 intheFbase; and which ai'rsupply -is regulated -i'n"acco'1dance with the opening of the'doors 1'4".(51' 1a 'As the heat increases in the eoinbustionichamber iandrthe water in the z'jacket'betomes heatedy which heating is greatly facilitated-by the provision of the wriested messes; the-heated vvater Will-rise :a'nd':'pass ofl' through"the outlet- 18', but this will not take place until the'vvater becomes 'thoroii ghly heated due" to the "partitions 19 Whichroperate to retard the rising of the l-ieatedwater"a'n'd .compels the Water as it *risesto take 'a' 'ciicuitbus path or course through tlfajacketrtherebyassuring the heating For the safii'eto' 2'; Fhigh temperature 7 To prevent: radiation of heat from the" Water jacketiit'cmayfhave a heat retaining jacket --or"covering-=27@of suitable material, 'suchtas -aniiasbestoscompound.orthe like.

'E-Havi ng thus described my invention, I

- claim In-1a Water heater, nested and spaced apartdomeishapedvshelis; 'the interior of co i or thieipatent m Beobtai'ned-for each partition havinga portion cut away-to provide an opening to 'co'nn'ect' adjacent chambers.

2.- In a water heater, nested 'and spaced apart dome shaped-shells, the interior of the inner shell constituting-a "combustion chamber and the "space between"the shellsa bottom andan outlet at the top"; "annular members to extend transversely .betwejenjthe walls of the jacket, i e'ach inen iber havin flanges to'supportand space it {from the next" adjacent lower partition to separate s'aid jacket into superposed chambers, and each A lpartition h avin a'cutaway iportion' 'to provide a communicating opening betWe jacent chambers whereby the partitions form *a circuitous *passage" from end to'iend of th'e jacket; and superposed "revie er Water t-iibes'ektending transversely of "the 'conlbustion' chamber with" adjacent rows iof tubes ezite'nding at right angles to each fother and .1466 Water jacket having an 'in'let adjacent tlie tov successive chambers formed by the partitio'Iis infth watercham'ber. Q "Signed at Detroitin the'coun'ty of Wayne and State of Michigan, this 14th "dayof "Jiineyl lq. 3

- EDWARD T. CURRAN. Witnesses Y O: BQOLDs;

Lo'rrm 0145s.

five cents each; by addressing 'the Commissioner ofZPatents, 

